INDEX 



647 



Sound, 223; intensity of, 223; pitch 

 of, 223; quality of ,~223. 



Sounds, of heart, 342; respiratory,397. 



Soup, value of, 498. 



Source, of animal heat, 541; of body 

 fat, 515; of glycogen, 493; of mus- 

 cular energy, 104; of urea, 517. 



Spaces, arachnoid, 142; intercellular, 

 18. 



Special senses, 205. 



Specific dynamic action of proteins, 

 ou y f o4o . 



Specific gravity of blood, 295. 



Specific nerve energies, 204. 



Spectacles, 265. 



Speech, 546. 



Speed of nerve impulse, 156. 



Sperm, 561. 



Spermatozoa, 560, 566. 



Sphenoid bone, 60. 



Sphere, attraction, 24. 



Spherical aberration, 263. 



Sphincter, 115; pyloric, 474. 



Spinal accessory nerve, 152. 



Spinal column, see Vertebral column. 



Spinal cord, 5, 138, 142; central canal 

 of, 141, 144; columns of, 144; com- 

 missures of, 144; fissures of, 143; 

 functions of, 160, 172; gray matter 

 of, 144; membranes of, 139; white 

 matter of, 144. 



Spinal cord reflexes, 162; cerebral 

 control of, 186; compared with 

 cortical, 180. 



Spinal ganglia, 147; nerve roots, 147; 

 nerves, 139, 147; distribution of, 

 148. 



Spindle, nuclear, 25. 



Spindles, muscle, 85. 



Spine, curvature of, 70. 



Splanchnic nerves, 375, 451; region, 

 375. 



Spleen, 5, 299; function of, 300. 



Splenic artery, 461. 



Sprains, 77. 



Spread of nerve impulse in both direc- 

 tions, 156. 



Squinting, 248. 



Staining, differential, 7. 



Stages of life, 584. 



Staircase phenomenon, 100. 



Stapedius muscle, 230. 



Stapes, 229. 



Starch, animal, 16; digestion of, 463, 

 465, 487; as food, 433. 



Stearin, 15. 



Stenson's duct, 448. 



Stereoscopic vision, 289. 



Sternum, 55, 64. 



Stimulation, necessity of, 93. 



Stimuli, 94, 204; increasing, influence 

 on contraction, 96; rapidly re- 

 peated, effect of, 102. 



Stirrup bone, 229. 



Stomach, 5, 442, 449; absorption 

 from, 491; digestion in, 488; his- 

 tology of, 451; importance of, 476; 

 movements of, 473; nervous con- 

 trol of, 477; salivary digestion in, 

 473. 



Storage, of carbohydrates, 493; of 

 glycogen in muscles, 494. 



Storage tissues, 32. 



Strabismus, 248. 



Strength of desperation, 201. 



Structure, vertebrate, 3. 



Strychnine poisoning, 162. 



Subclavian artery, 330; vein, 333. 



Subcutaneous areolar tissue, 531. 



Sublingual gland, 448. 



Submaxillary gland, 448. 



Successive myelination, 172. 



Succus entericus, 465; control of, 487. 



Sucrase, 466. 



Sucrose, 433. 



Sudoriparous glands, 534. 



Sugar, 433; as food, 493; as fuel for 

 muscles, 105; elimination of 

 through kidney, 494. 



Sulcus spiralis, 233. 



Superior maxillary nerve, 151; mesen- 

 teric artery, 461; oblique muscle, 

 247; rectus muscle, 246. 



Supination, 76. 



Supplemental air, 397. 



Supporting tissue, 31; system, 37. 



Suprarenal capsules, 199. 



Suspensory ligament of eye, 254, 261. 



Sutures, 71. 



Swallowing, 470. 



Sweat, 535; center, 536; glands, 480, 

 534; nervous and circulatory factors 

 in, 536. 



Sweating, relation of to heat loss, 542. 



Sweet bread, 460. 



Sylvius, fissure of, 176. 



Sympathetic ganglion, 154. 



Sympathetic resonance, 225, 227. 



Sympathetic system, see Autonomic 

 system. 



Synapse, 137; relation of to gray 

 matter, 153. 



Synaptic fatigue, 198; resistance, 161. 



Synovia! fluid, 74; membrane, 74. 



System, alimentary, 39, 442; auto- 

 nomic, 139, 154, 193; circulatory, 

 39, 322; conductive, 38, 135; diges- 

 tive, 39, 442; excretory, 39, 516; 



